Feeding mechanism for printing-machines.



PATENTED MAR.

I G. GAMMBTER. FEEDING- MEGHANISM PCB PRINTING MACHINES.

APPLICATION FILED SEPT. 19, 1904.

2 SHEBTSSHEBT 1.

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PATENTED MAR. 12, 1907.

H. G. GAMMETER. FEEDING MECHANISM FOR PRINTING MACHINES.

APPLIGATION FILED SEPT.19,1904.

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I awenmz Q? W Q7 MW, WMJ- i UNITED STATES PATENT OFFICE.

HARRY C. GAMMETER, OF CLEVELAND, OHIO, ASSIGN OR TO THE AMERICAN MULTIGRAPH COMPANY, .OF CLEVELAND, OHIO, A CORPORATION OHIO.

FEE- DING MECHANISM FOR PRINTING-MACHINES.

Batented Marcela, 1907;

Application filed September 19, 1904" Serial No. 225.154.

To all whmn it may concern:

Be it known that I, HARRY C. GAMMETER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Feeding Mechanism for Printing-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a simple and eflicient mechanism for feeding sheets of paper to a printing-machine.

It is especially adapted for a printing-ma chine comprising a rotary drum-and a cooperating rotary impression-platen. The drum may be arranged to carry longitudinal rows of individual type and an inking-ribbon surrounding the same, as shown, described, and claimed in my Patent No. 7 22,404, issued March 10, 1903, and my applications, Serial Nos. 146,651 and 196,840, filed March 7, 1903,

and March 7, 1904, respectively.

The present invention'may be most conveniently summarized as, consisting of the combinations of parts hereinafter more fully described, and definitely set out in the claims.

In the drawing, Figure 1 is a vertical section through a rotary printing mechanism embodying my invention, and Fig. 2 is a front elevation thereof. Fig. 3 is a view in elevation from the right-hand end of Fig. 2 with the frame member and the parts outside thereof omitted, beingsubstantially a crosssection on the line 3 3 of Fig. 2 looking toward theleft. 'Figs. 4 and 5 are respectively crosssections on lines 4 4 and 5 5 of Fig. 2 looking toward the right.

Referring to the parts by letters, A represents any suitable frame having a pair of uprights.

B is the printing-drum, mounted on the shaft 1), which is journaled in the frame. On this printing-drum are longitudinal rails 1), adapted to carry individual type. (Not shown.) Within anopening in the periphery of the drum area pair of spools b b for an inktype thereon and then to the other spool. t

frame member A. Springs K, acting on 9 a soft surface of rubber or other material. This platen carries on its end a gear (1, which meshes with a gear 12 on the periphery of the printing-drum. Thus the printing-drum and 6 impression-platen are rotated in unison, and if paper be fed to their cooperatingsurfaces itwill be drawn between them by their rotation and will be printed by the typeonithe rails I) through the inking-ribbon. J i

E represents a portion of a table on which the sheet of paper to be printedis placed by hand. The mechanism comprising the resent invention,which will now be particu arly described, operates at the proper time to grip" 7 J ournaled on the shaft 6, beneath the print- 5 ing-drum, is an impression-platen D, having such paper and fee r it-along to the cooper" with thegear d on the impression-platen, I8

wherefore the roller G is rotated continii ously as the printing-drum rotates. The sectional rolls 9 project up through the openings e in the table E, so that the upper surface of the roll is slightly above the plane of 8 the table-top. Mounted above the table and On the end of the shaft g? is a directly over the roller G is a roller H, 'jour I naled on a shaft h, which is secured at its ends to arms, J J, which are pivoted at j to. a

these arms .J J, press upward on their rear .ends, and thus tend to bring the roller H into 1 contact with the roller G. The arm J carries"; at its end the roller j, adapted to ride under a peripheral rib I), carried by the drum. F9 This keeps the rollers H and G normally out of contact with each other. For a portion of the periphery thisrih is depressed or omitted, and when this portion comes over the roller 1' the spring 10 is free to act and forces I the rear of the arms J J upward, bringing the roller H down into contact with the roller G,. and thus gripping the paper between them. To prevent the paper being prematurely or accidentallyfe'd, I rovide sto s in the form x of levers L, pivote to a make aft Z and upwardly-turned ends Z adapted to project through openings in the table. These le:-:

" verslibetween the sleeves g,

re enrp t e position shown in the position of these stops when the rollers H I and G are out of contact, the enrls of the stops engaging. the surface of the roller H. On the forward end of-one of the arms J is a downwardly-extending lug 3' which is adapted to engage a short rock-arm l and the shaft 1'." The result of this is that when the dep'ressioni in the rib b allows the roller 7 to rise-under the influence of spring K the arm descending, rocks downward the arm 1 thus depressing the various stop-levers L, as

shown in Fig. 5 and freeing the paper, which is at once, fed by the gripping-rollers.

A suitable guide-plate N (omitted in Figs. 1 and 2, but shown in Fig. 4) is secured to the frame in front of the roller- H and extends nearly to'the table E. The sheet of(paper to be printed is placed on the table an forward by hand along the same and beneath' shoved this guide-plate until its end is stoppedby the stops 1. At the proper time the rib b, releasing the roller j, causes the depression of the roller H, thus concurrently displacing the stops 1 and grip ing the paper between the rolls H and C. Vhen the paper is thus gripped, the rotation of the feed-rolls ad- Vance the paper along the table until its free I end strikes the impression-platen, and this car- 'ries it upward between itself and the soft roller 1, which lies against the platen, being spring-pressed thereto by springs 10 and arms p, in which the roller is journaled. After passing between the roller P and the impres sion-platen D the continued rotation of these parts carries the paper along until its free end passes between the type on the printing drum and the impressmn-platen, which car ries it through the machine. v

To regulate the time of beginning of the paper feed, I mount the rib b on a ring I)", which surrounds the printing-drum and may be turned about the same and locked in any desired position, as illustrated by the setscrew 1)", which may screw through the ring into any of the series of threaded holes I) in the drum. This adjustment of the beginning I of the paper feed allows the matter set up on the drum to be printed on any portion of the sheet and provides the letter-heads havinga various amount of existing printing thereon. 55

1. The combination of a printing-drum, an impression-platen a pair 01 paper-teed rollers, arms for holding one of said rollers out of contact with the other, a roller carried by one of said arms, a member adjustably carried by said drum and adapted to engage said last-mentioned roller to govern engagement of the feed-rollers, and means for driving one of the feed-rollers. y

2. The combination of a printing-drum, an

impression-platen a pair 01' feed-rollers, one above the other, gearing connecting the drum and lower feed-rollena movable ring surjustably locked thereto, and means carried by said ring and adapted to periodically cause depression of the upper feed-roller into gripping engagement with the lower roller.

3. The combination of a rotary printin ,drum,'an impression-platen, apair of fee rollers, an intermediately-pivoted arm s'upporting near one endone of the feed rollers and carrying near the other end a cam-roller,

an adjustable ring surrounding the drum, and a cam on said ring adapted to engage said can1roller. I

4. The combi'nationof a rotary printingdrum, anim ression-lplaten, a pair? of feedrollers, one a ove the other, means ford v ,ing the.1ower feed-roller, a pivoted arm arrymg one end'of the upper feed-roller, means on the drum to engage said arm and thereby move the feed-roller, a rock-shaft, a series of 'upwardlyprojecting stops carried thereby, a rock-arm on said rock-shaft, and a downward projection on, the arm first mentioned adapted to bear on said rock-arm whereby when the upper feed-roller is lowered said stops are thereby withdrawn from active position.

In testimony whereof, I hereunto affix my signature in the presence of two witnesses.

Witnesses:

N. FZBRESNAIN.

rounding the periphery of the drum and ad- 70' HARRY c. GAMMETER.

' ALBERT H. BATES, 

